138711932 has 12 divisors (see below), whose sum is σ = 255522120. Its totient is φ = 65705616.

The previous prime is 138711917. The next prime is 138711943. The reversal of 138711932 is 239117831.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 138711892 and 138711901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912503 + ... + 912654.

It is an arithmetic number, because the mean of its divisors is an integer number (21293510).

Almost surely, 2^138711932 is an apocalyptic number.

It is an amenable number.

138711932 is a deficient number, since it is larger than the sum of its proper divisors (116810188).

138711932 is a wasteful number, since it uses less digits than its factorization.

138711932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825180 (or 1825178 counting only the distinct ones).

The product of its digits is 9072, while the sum is 35.

The square root of 138711932 is about 11777.6029819314. The cubic root of 138711932 is about 517.6520523734.

The spelling of 138711932 in words is "one hundred thirty-eight million, seven hundred eleven thousand, nine hundred thirty-two".